CN106535726B - For preparing the machine of liquid product especially by capsule - Google Patents

Abstract

A kind of machine being used to prepare liquid food products includes pump (4), the pump (4) has pump case (30), the pump case (30) has entrance (34) and outlet (35), cylinder (38) are defined in the pump case (30), piston (41) at least partly extends in the cylinder (38), to limit the operating room of variable volume.There are transmission layout structure (44,48) between the axis (33a) and the piston (41) of the motor (33), the transmission layout structure (44,48) is configured to the reciprocating motion with the predetermined stroke between progressive position and retracted position for causing the piston (41), and change the volume of the operating room as a result,.The pump (4), which has, introduces valve (42-43) and transfer valve (52-53), is in fluid communication for correspondingly connecting into the operating room with the entrance (34) of the pump case (30) and outlet (35).The transmission layout structure (44,48) includes actuation member (44), and the actuation member (44) drives rotation by the axis (33a) of the motor (33), and is operatively coupled the piston (38).The actuation member (44) defines cam path (47) that the piston (41) is couple to the cam path (47) via corresponding cam follower (48).The cam path (47) is arranged the predetermined stroke for determining the piston (41) between the progressive position and the retracted position in advance.

Description

For preparing the machine of liquid product especially by capsule

Technical field

This patent disclosure relates generally to the liquid products that is used to prepare liquid food products, particularly can be obtained by capsule Machine.

Background technique

The machine for being usually used to prepare the signified type of the machine of coffee and soluble products is typically provided with pump, the pump It can be actuated to promote water from water tank to infusion chamber.Supply connection setting usually between water tank and infusion chamber is for adding The device of hot water.

It is usually oscillating column pump for the pump in this kind of machine, the electrical actuator of the oscillating column pump is made up of solenoid.This Class, which pumps (for example, with reference to EP1205663 A1), has main body (being usually made of plastic material), and the main body, which has, has entrance With the chamber of outlet, the entrance and the outlet are substantially coaxial each other.The chamber of valve body includes the axially aligned cylinder to entrance Shape room.Being slidably mounted in drum-shaped chamber is the piston made of ferromagnetic material, and the piston is axially hollow, and And it is actuated by spring towards normal progressive position.The pump, which includes, introduces valve (intake valve), has substantially In the valve seat that the end opposite with entrance of drum-shaped chamber limits；And opening/closing with corresponding reset spring Element.The position opposite with valve is introduced is arranged in is transfer valve, and the transfer valve is made up of check-valves.In drum-shaped chamber Coil is installed, the coil has corresponding every magnetic bushing and magnetic interval on outside.

In operation, solenoidal coil is supplied, in a periodic manner to cause the reciprocating motion of piston.In particular, When supply coil, the effect that piston resists corresponding spring is withdrawn, so as to cause the opening for introducing valve.Entrance in pump The water flowing at place occupies into piston and is introducing the hollow space for including between valve and transfer valve, and the transfer valve is at this It is closed in step.Then interrupt the supply to coil, wherein piston is promoted by corresponding spring towards initial progressive position It is dynamic, to be again switched off introducing valve.In addition, the advance of piston cause include water in said hollow space compression, thus Transfer valve is opened, and therefore, keeps water mobile towards the outlet of pump.After the new supply of coil, as described above, piston It withdraws, so as to cause the new opening for being re-closing off and introducing valve of transfer valve.The certain right and wrong of the frequency of the supply cycle of coil It is often high.

These pumps are the sources of sizable vibration and noise during operation.This kind of pump another problem is that corresponding Piston retraction and advancing stroke can not correspondingly definitely define, as long as they are obtained by solenoid and spring.Cause This, there are counter-pressure, the stroke of piston can change.This also means that the control of these pumps is usually complexity , such as in terms of conveying or the adjusting of pressure, and the control system that imply machine will have obtainable feedback signal. For this reason, machine must be equipped with complicated and expensive measurement sensor, such as volume sensor and pressure sensor.

By US5392694 A, it is also known that a kind of machine for being used to prepare liquid product, the machine include pump, the pump With piston and with the pump case of cylindrical chamber, wherein piston is to move back and forth movement.The pump, which has, introduces valve and conveying Valve, the two and cylindrical chamber are in fluid communication.When the retrogressing by piston determines that there are subatmospheric power in drum-shaped chamber When pressure, introduces valve and open.On the contrary, when the advance by piston determines the pressure existed in drum-shaped chamber higher than discharge pressure When power, transfer valve is opened.It reciprocates through the motor with rotary shaft to generate, associated with the rotary shaft is bent The transmission layout structure of axis type.Particularly, associated with the axis of motor is the snail engaged with the gear for rotating eccentric wheel Bar.Associated with eccentric wheel is the first end of crank, and the second end of the crank is alternatively associated with piston.The solution Scheme shows following advantage, it may be assumed that the forward stroke and retract stroke of piston are accurately defined.However, the transmission arrangments Structure is that heavy and noise is biggish.

Then, perfusion is generally activated in the pump used in the machine of liquid product that is used to prepare of known type (priming) influence of problem, this is because on startup it is possible inaccuracy operation in the case where, air occasionally there are in In the main body of pump.

Summary of the invention

In general with regard to it, described the object of the present invention is to provide a kind of machine of type being previously mentioned at beginning There is machine it to operate the pump characterized by reduced vibration and noise, and with compact and simple from the perspective of construction Structure, but work and reliably.Of the invention another the goal is to provide a kind of such machines, it may be assumed that it controls system System can control some operating quantity of corresponding pump in simple and cheap mode.It is of the invention it is another the goal is to provide A kind of such machine, wherein eliminate or at least significantly reduce possible starting perfusion problem.

According to the present invention, at least one of preceding aim is general because being presented below as being used to prepare for the feature described in text Beverage and the machine of liquid product and realize.It is of the invention to be advantageously improved scheme and hereinafter be elaborated.Right is wanted Book is asked to form the component part about present invention technical teaching provided in this article.

Detailed description of the invention

Referring to attached drawing, by subsequent detailed description, other purpose of the invention, characteristics and advantages will be clearly presented Out, attached drawing is only used as non-limiting example to provide, and in the accompanying drawings:

- Fig. 1 is the schematic diagram of the possible embodiment of the machine according to the present invention for being used to prepare liquid product；

- Fig. 2 is the cross section and perspective of the pump of the machine of possible embodiment according to the present invention；

- Fig. 3 and Fig. 4 is the schematic cross sectional view of the pump of Fig. 2 under two kinds of different operating states；

- Fig. 5 is view similar with the view of Fig. 4, wherein illustrates some components of the starting perfusion system of pump；

Part and schematical cross section and perspective of-the Fig. 6 and Fig. 7 for the pump of Fig. 2-5 in the first mode of operation；

- Fig. 8, Fig. 9 and Figure 10 are part and the schematical cutting perspective of the pump of Fig. 2-5 in this second mode of operation Figure；

Part and schematical cross section and perspective of-the Figure 11 and Figure 12 for the pump of Fig. 3-10, wherein starting perfusion system Correspondingly it is in off position and operating position；And

Part and schematical cross-sectional view of-the Figure 13 and Figure 14 for the pump of Fig. 3-10, wherein aforementioned starting perfusion system Correspondingly it is in off position and operating position.

Specific embodiment

In subsequent descriptions, various details are illustrated, these details are intended to provide the deep reason to embodiment Solution.These embodiments can provide without one or more of these specific details, or using other methods, Component, material etc. provide.In other cases, obvious structure, material or operation to those skilled in the art It is not specifically shown or described in detail, so that the various aspects of embodiment will not be obscured.To " embodiment " in the frame of this specification Or the reference of " one embodiment " is intended to indicate that specifically construction, structure or characteristic are included described in the embodiment In at least one embodiment.Therefore, may be present in the different location of this specification for example " in embodiment " or " at one In embodiment " etc term be not necessarily referring to one and identical embodiment.In addition, specific construction, structure or characteristic It can combine in any suitable manner in one or more embodiments.Reference used herein provides only for convenient, And the protection scope or range of embodiment therefore, are not limited.

The machine for being used to prepare liquid product of possible embodiment according to the present invention is schematically illustrated in Fig. 1.

The machine indicated as a whole by 1 includes the source 2 of liquid, and the source 2 of the liquid is false here Being set to is water tank for cold water.Water tank 2 has outlet conduit 3, and pump 4 operates on the outlet conduit 3.It is preferred that but not necessarily Being arranged on pipeline 3 in the downstream of pump 4 is type water heating elements known per se, such as boiler 5.In represented example In, the outlet of boiler 5 is connected to pipeline 6, for hot water and/or steam under pressure to be supplied to the distributing equipment by 7 marks Entrance, the distributing equipment such as slide dispenser.When distributor 7 is in the first operating position (on the left side, such as in Fig. 1 Observation) when, pipeline 6 is arranged to be connected to pipeline 8 by it, and the pipeline 8 is for being applied to convey the external spray of hot water and/or steam The nozzle 9 of mouth；Alternatively, when distributor 7 is in the second operating position (on the right, such as observing in Fig. 1), pipeline 6 is set It is set to and is in fluid communication with pipeline 10 for pressurized hot water to be supplied to conveying assembly 11.Finally, when distributor 7 is in not operation position When setting and (at center, such as observing in Fig. 1), pipeline 6 and pipeline 12 are in fluid communication for returning to water in water tank 2.

The scheme of Fig. 1 is only example, wherein distributor 7 can be it is motor-driven, or by suitable connector and Motor operated valve substitutes, and the motor operated valve can be dominated by the control system of machine 1, such as be not provided in machine In the case where nozzle 9.In the case where the distributor of manual operation, preferably associated therewith is for detecting distributor institute The electric transducer device (for example, one or more microswitches) of the position of presentation.

In general, component 11 has support construction, there are the first of brewing room or infusion chamber in the support construction Part 11a and second part 11b, at least one of the two part are removable relative to another.For example, preceding sections can be with Main body or capsule holder and syringe including cupuliform.Then, component 11, which has to be inserted into component for capsule 12, is System.Be connected to a part of brewing room is pipeline 10, and another part have for convey can using capsule 12 acquisition The outlet of beverage or other liquid products.According to known technology, water and/or steam are actuated to brewing room 11a-11b by pump 4 In, will pass through capsule 12, and generated as a result, through machine 1 convey liquid product (in the case where seal capsule, The part 11a and 11b of brewing room can also be equipped with perforation end (perforation tip) etc.).

Conveying assembly 11 can have any type as known in the art, for example, such as with the name of the applicant 20,13/,182,923 20,13/,150,480 2013/140282 A1, WO 2013/111088 of A1, WO of A1, WO of WO of submission Described in one or more of 20,13/,038,318 2012/168917 A1 of A1, WO of A1, WO, WO2012168918 A1 , the description of the possible type about the cylinder (whether no matter sealing) that can be used in machine according to the present invention, reader Referring also to above-mentioned document.On the other hand, it is noted that it is can also be applied to using the pod packet made of paper material Machine, and be applied to following machine in, it may be assumed that the brewing room of the machine is designed to before directly receiving liquid product Body (precursor), without the intermediary of capsule or pod packet, such as granular or powdery preparation, such as ground coffee.

Fig. 1 also highlights the control system of machine 1 in a manner of extreme schematical, and the control system includes: including place The control unit 15 for managing device, for example, microcontroller 16；And non-volatile memory device 17, it is to use what is wherein encoded In the instruction of the operation of machine, for example, in the form of one or more operation sequences.

Control unit 15 and specifically microcontroller 16 are arranged for controlling in advance: the heating device of machine 1, It is indicated here by the resistance of boiler 5；And pump 4, it is used to implement the possible operation mould of one or more of machine Formula.

In this example, dotted arrow 18 and 19 correspondingly indicated as example from unit 15 to pump 4 and to boiler 5 control Route.Dotted arrow 20 indicates possible between sensor device associated with distributor 7 and unit 15 as example Route is controlled, so that operating position that unit 15 will be appreciated by assigning manually on the dispenser (it has been noted, being automatically brought into operation In the case of, can be unit 15 to control the mode of operation of the positioning of such distributor or the valve gear for substituting it).Such as by force It adjusts, scheme provided herein only has with the purpose of the function connects between the prominent interested each section of intuitive way, The hydraulic and circuit layout for forming the machine of subject of the present invention, which can according to need, carrys out various be configured differently.

Fig. 2 is the schematic diagram of the pump of machine according to the present invention, and the pump is marked by appended drawing reference 4 as a whole Show.Pump 4 includes shell 30, and the shell 30 is here by the cup-shaped body 30a and lid 30b being coupled together in a manner of fluid-tight It is formed.In a preferred embodiment, shell 30 and/or its part is formed by plastic material, particularly the thermoplasticity of injection moldable Material is made.

Shell 30 defines chamber 31, and in the chamber 31 is pumping arragement construction, and the pumping arragement construction is as one A to indicate entirely through 32, the pumping arragement construction can drive via electrical actuator 33.Shell 30, i.e. its fluid tight Chamber 31 have inlet port 34(referring also to Fig. 3-6) and conveying export 35.

In the preferred embodiment of embodiment for example exemplified herein etc, outlet 35 is limited at the axial end of shell 30 At portion, and entrance 34 is in the lateral position of the shell.In one suchembodiment, actuator 33 is preferably located in shell 30 Another axial end portion so that as a whole can get pump 4 it is compactly designed.For this purpose, as illustrated in In the case where, lid 30b, which also may be shaped such that, defines the positioning seat of the front for actuator 33.

The electrical actuator 33 of pump 4 is motor, and the motor has the shell rotary shaft 33a outstanding from motor.In the present invention Preferred embodiment in, motor 33 be the direct current generator known per se with concept.On the other hand, with some other types The motor of rotary shaft is not excluded from the scope of the present invention, for example, brushless motor, stepper motor or alternating current generator.

In a preferred embodiment of the invention, pumping arragement construction 32 includes piston holder component or module 36.Institute In example, module 36 includes for example substantially columnar made of the single-piece of plastic material, particularly thermoplastic material Stationary body.Preferably via axial seal and radial seal, module 36 is mounted in chamber 31 in a manner of fluid-tight. For this purpose, in this example, radial o-ring 36a is provided in the week of the inner peripheral surface of module 36 and the central protrusion of lower cover 30b It is operated between face, and axial o-ring 36b is operated between module 36 and the end face of main body 30a faced, wherein outlet 35 In the region that o-ring 36b limits (circumscribe).As for example in Fig. 3 it will be clear that, in module 36 Peripheral wall in limit is access 37, the access 37 is used to for the inside of module itself to be arranged to 34 fluid of entrance with chamber 31 Connection.

One or more rooms or cylinder are defined in piston holder module 36.In this example, it defines along module 36 Axial direction extend two cylinders 38, described two cylinders 38 be in the axis 33a's each other and relative to motor 33 Rotation axis R substantially parallel position.Also referring to Fig. 3, a part of 39a of the chamber of module 36 is limited under cylinder 38, phase The plate 40 static for module 36 is housed in the part 39a, and the plate 40 is installed at the base portion of cylinder 38, and Define through-hole (not shown), the through-hole is respectively axially aligned to arrive corresponding cylinder.It is equipped with by the aforementioned apertures of plate 40 excellent The cylindrical part of selection of land corresponding piston 41 made of the plastic material of such as thermoplastic material etc.Each piston 41 to Partially extend in corresponding cylinder 38, to limit the operating room of variable volume.Preferably, in the proximal end of cylinder 38 Place and the positioning seat of the corresponding guidance and seal cartridge 40a for piston 41 is defined in the hole of plate 40.Plate 40 can also be by Plastic material is made.

In the preferred embodiment of the embodiment illustrated by for example etc, valve gear, the valve are provided in cylinder 38 Device can interact with piston 41, in order to provide the pumping of liquid.

In one embodiment of such as illustrated embodiment etc, piston 41 has axial cavity 41a, and in the upper of them Valve seat 41b is defined at end, corresponding open/close element 42 is supported on the valve seat 41b.Such as it made of rubber beats Opening/closing element 42 is axially aligned piston 41, and is supported by the first end of helical spring 43, the helical spring 43 Opposite end the far-end of corresponding cylinder 38 is for example constrained on by mechanical interference.It will be clear that ground is in as follows Existing, valve 43-43 is to introduce valve.

What it is 44 marks is such as actuation member made of plastic material, and the actuation member passes through the axis of motor 30 33a driving rotation, the axis 33a is especially rotatable around axis R.Component 44 is housed in the lower chamber 39a of module 36 And it is mounted to axis 33a, the axis 33a passes through the corresponding hole of lid 30b, to the corresponding hole operation related Connection is sealing device.In the example shown, in the position of periphery extending part (stretch) relative to aforementioned apertures, 30b limit is covered The seat for accommodating two radial o-rings 45 is determined, described two radial direction o-rings 45 cooperate with axis 33a, to prevent water towards electricity The leakage of machine 33.Moreover it is preferred that the upper surface of lid 30b also defines annular relief 46(Fig. 3), the annular relief 46 limits The upper end for the hole passed through axis 33a is determined.Actuation member 44 is placed on relief 46 at bottom, to minimize component itself Contact surface between the upper surface of lid 30b.

In corresponding proximal end region, piston 41 is coupled to actuation member 44 as follows, it may be assumed that the rotation of the latter will Determining has presetting between the maximum position advanced of the distal end relative to cylinder itself and the position of maximum retraction Stroke each piston 41 it is reciprocal axially displaced in corresponding cylinder 38, and change corresponding work as a result, The volume of room.In a preferred embodiment, actuation member 44 defines cam path 47, and each piston 41 is via corresponding cam Driven member 48 cooperates with the cam path 47.Cam path 47 relative to rotation axis R be it is generally ramped, live to determine Plug 41 it is reciprocal axially displaced.Illustrated by, the movement of piston 41 is substantially sinusoidal, and cam and convex The coupling between driven member is taken turns so that the maximum position advanced of a piston 41 corresponds to the maximum retraction of another piston 41 Position.It in the particular case shown, corresponding to the complete rotation of component 44 is two of each piston 41 complete past Multiple displacement.

In a particularly advantageous embodiment, actuation member 44 includes drum cam (drum cam), that is, substantially cylinder-shaped Main body, define cam path 47 on the circumferential surface of the main body, the cam path 47 is here by relative to rotary shaft The inclined annular groove of line R obtains, and cam follower 47 is engaged in the cam path 47.In this example, cam follower 47 are configured to from the base portion side of piston to element outstanding, and the element is preferably substantial cylindrical, and is engaged with It defines in the slot of cam path.Hereinafter, for the sake of simplicity, component 44 will be referred to as " cam ".

Each cylinder 38 of module 36 is connected to by means of corresponding check-valves or non-return valve and 35 fluids of conveying outlet Connection, corresponding check-valves or non-return valve play transfer valve.As follows middle by presentation, such check-valves can It is in open position during the position that corresponding piston 41 advances from the displacement of maximum retraction to maximum.

In one embodiment, being arranged in the part opposite with cam 44 of module 36 is quantity phase with cylinder 38 The valve chest of corresponding quantity.Therefore, in the shown embodiment, be provided with preferably columnar two shells 49, described two A shell 49 is opened in the endface opposite with chamber 39a of module 36, and is positioned against circle be preferably parallel to cylinder 38 Cylinder 38 is axially extending.Each shell 49 (only represents in these ports via the port in their own proximal end in Fig. 2 One and its indicated by 49a) with cylinder 38 be in fluid communication.On the contrary, the distal end of shell 49 and the outlet 35 of valve casing 30 are flowed Body connection, this is the axial end in module 36 and shell main body 30a by being in region defined by o-ring 36b here The radial passage (radiusing passage) 50 limited between surface in portion.

Valve seat 51(Fig. 3 is defined in the proximal end region of each shell 49), on the valve seat 51, such as by rubber system At open/close element 52 actuated by corresponding helical spring 53.Here, spring 53 with it is corresponding open/ The opposite end of closing element 52 is placed on the inner surface of the axial end portion of shell main body 30a.Therefore, as it can be noticed, In the transfer valve illustrated by, open/close element 52 is maintained at the corresponding valve seat 51 being arranged on piston by spring 53 Normal closed position.

During the normal operating of pump 4, motor 33 is actuated to cause the rotation of cam 44.Preferably, motor 33 is along master Direction of rotation want or scheduled is actuated, and described main or scheduled direction of rotation will be assumed to be clockwise herein Direction of rotation, the direction of rotation are indicated in the lower part of Fig. 3 by arrow F.The lower chamber 39a of module 36 provides pump 4 Aerated area (draught area).It is assumed that in the presence of the entrance 34 and access 34 that are connected to water tank, in fact, chamber 39a is in water Water is at least partially filled under case pressure.

As it was earlier mentioned, the rotation of cam 44 causes the reciprocating motion of piston 41, wherein piston advances and another A withdrawal.Fig. 3 correspondingly illustrates the maximum state advanced with maximum retraction of the piston 41 on right side and the piston 41 in left side, and Fig. 4 illustrates opposite state.

For example, referring to the piston 41 on right side, in the position (Fig. 3) that maximum is advanced, in the state of the maximum compression of spring 43 Under, chamber 41a is closed by the corresponding open/close element 42 for introducing valve.As piston 41 is withdrawn, spring 43 gradually expands Exhibition, to temporarily be maintained open/closing element 42 still in the chamber 41a of closure piston in the state of.The retraction of piston makes relatively The volume of the room of the variable volume for the cylinder 38 answered increases.Indoor fluid by its pressure reduction to be lower than introduce pressure value, And the power as caused by pressure difference makes to introduce valve opening, that is, causes the corresponding valve seat in open/close element 42 and piston Separation between 41b, to obtain the opening (spring 42 certainly for this purpose to calibrate) of axial cavity 41a.Next, in cavity portion In the aerated area for dividing 39a given, piston 41 reaches the position of (Fig. 4) maximum retraction.In this step, at transfer valve 52-53 In closed position.Meanwhile opposite sequence of motion is provided for the piston 41 in left side.

As it would be appreciated, during piston 41 retracts, it is determined that cylinder 38, i.e. corresponding operating room have With the increase of volume, wherein when corresponding open/close element 42 is in the open state middle, water passes through from cavity segment 39a Hollow piston 41 is moved to cylinder itself.On the contrary, the volume of operating room subtracts during the subsequent advance of identical piston It is small, and the water being included in is subjected to after being at least moved in open/close element 42 in the state of the chamber 41a of closure piston Compression.This opens transfer valve 52-53, that is, its open/close element is caused to fight the retrogressing of the effect of corresponding spring. Then, open/close element 52 discharges corresponding valve seat 51, so that water energy is enough to be moved to shell 49 from cylinder 38, and And then, conveying outlet 35 is moved to via connecting path 50.Then, the retraction subsequent in cylinder 38 of piston 41 is so that conveying Valve 52-53 can be re-closing off by the effect of corresponding spring.

Via the shift cycle occurred in a reciprocal manner for set all pistons, by water from pump 4 Entrance 34 is actuated to outlet 35.

Described pump 4 has very compact structure, to allow to obtain under any circumstance to described herein Application for sufficient pressure and flow.One substantial advantage of machine according to the present invention is by following fact come table Show, it may be assumed that instead of solenoid, motor is used to pump a possibility that making it possible to increase control pump, and reduce the component of machine Quantity.Using for motor 33 makes compared with the pump traditionally used on the machine for be used to prepare beverage, can be greatly decreased The vibration of operation and noise.

As described above, in a preferred embodiment, the motor for pumping 33 is direct current generator, preferably has permanent magnet (or tool There is collector).This kind of motor has low-down cost, and reliable and control is simple.

In one embodiment, control unit 15 has the device for measuring the electric current that motor 33 is absorbed, the dress It sets and is indicated in Fig. 1 by A as a whole.For example, measuring device 18 may include the electricity for being integrated in control unit 15 Ammeter in daughter board.On the other hand, using other kinds of sensor or current sensor (amperometric Transducer it) is not excluded from the scope of the present invention.

In one embodiment, control unit 15 is configured for being absorbed based on the motor 33 detected via device 18 Electric current value, come infer pump 4 outlet 35 at pressure.In this way, control logic is fully able to from host computer pressure Value, to avoid the need for being equipped with the pressure sensor specially provided to machine 1.For this purpose, for example, with 16 phase of microcontroller In associated memory device 17, information is for example encoded in table form, for each absorption current value detected, control The information is used to calculate the purpose of pressure value by unit 15 processed.

In one embodiment, control unit 15 is arranged the revolution (revolutions per minute for calculating motor 33 in advance (r.p.m.)).It will be appreciated that if the voltage-current characteristic curve of direct current generator be it is known, be easy to obtain opposite The revolution answered.For this purpose, it has been noted, control unit can obtain 33 institute of motor by the device A designed for this purpose The value of the electric current of absorption.On the other hand, the value of the supply voltage of motor 33 or armature voltage (armature voltage) can be with It is the parameter of setting, and is known for control unit 15 therefore.However, prevented without what setting for changing The supply voltage or armature voltage and the device for thus changing its speed, described device of motor 33 schematically show in Fig. 1 It indicates out and by V.In any case, aforesaid voltage value is known for unit 15, the unit 15 because This can calculate the revolution of motor, without particular sensor.For this purpose, what is encoded in memory device 17 is to indicate electricity The information of the voltage-current characteristic curve of machine.

In one embodiment, control unit 15 is arranged in advance for the rotation speed based on corresponding motor 33 (revolutions per minute) pumps 4 flow to calculate.It will be appreciated that passing through the amount of the liquid of 4 transmission of pump and the displacement speed of piston 41 Proportional variation is spent, and therefore, in final analysis, variation proportional to the speed of motor 33.Equally, for such meter It calculates, such as the information obtained on the basis of test is coded in memory device 17, information representation motor 33 Existing relationship between speed and the flow for pumping 4.The revolutions per minute letter obtained based on the information and in the previously described manner Breath, control unit 15 can calculate the value of the flow of pump 4.In this way, it does not need to be equipped with the flow specially provided to machine 1 Or volume sensor.Certainly, on equal footing, pump 4 can also be accurately controlled by changing the speed of motor 33 Conveying.

In a possible embodiment, control system is equipped with for measuring the device A for the electric current that motor 33 is absorbed and being used for Change its both device V for supplying voltage.In such embodiments, control unit 15 can be arranged for according to electricity in advance The electric current that machine 33 is absorbed supplies voltage (and therefore, speed) to change, to guarantee constant pressure.For this purpose Necessary information is also encoded into this case in memory device 17.

In one embodiment, the motor 33 for pumping 4 is either-rotation motor；That is, it can be driven in opposite direction, without Described operation can be endangered.For example, the reverse of rotation can be by reversing armature in the preferred situation using direct current generator Voltage or driving voltage obtain, wherein control system 15 is disposed with the inversion set specially provided, the inversion set in advance It is indicated in Fig. 1 by I.

In an embodiment of the present invention, pump 4 has starting perfusion system (priming system) comprising recycling Valve, the recycle valve can be actuated arragement construction and driven by corresponding, so that the discharge pressure of pump 4 reaches atmospheric pressure Power.For this purpose, in a particularly advantageous embodiment, actuating arragement construction and being arranged in advance for making recycle valve in motor Axis (had previously been limited to Main way or predetermined direction, and has been assumed to up time along minor direction, i.e. with the direction normally actuated The direction of rotation of needle) opposite direction rotate after open.

Referring to Fig. 5, in one embodiment, being arranged in the part opposite with cam 44 of module 36 is for aforementioned Valve housing 60 is recycled, shell 60 described herein is in and cam 44, the i.e. substantially coaxial position with rotation axis R.It answers It is only to understanding that mentioned starting fills when it is noted that Fig. 5 is similar to Fig. 4, but what is wherein indicated using appended drawing reference Useful component for the operation of injection system.

Shell 60 is constructed in a manner of the shell 49 for being similar to Fig. 3 and Fig. 4, wherein corresponding lower port 60a tool There is a preferably circular section, the top with the chamber of piston holder inside modules in this case the lower port 60a Part 39b connection, the cavity segment on the top are in an intermediate position relative to cylinder 38.It is limited in the lower area of shell 60 It is valve seat 61, and the upper end of shell 60 is connected to connecting path 50, i.e. with outlet 35.Recycle valve in shell 60 have with it is defeated Send valve similar concept, wherein corresponding open/close element 62 is actuated to valve seat 61 by corresponding spring 63 and normally closes The position closed.

Fig. 6 to Figure 10 is also referred to, the arragement construction that actuates of recycle valve 62-63 includes the first lower part rotating member, described First lower part rotating member is indicated by 65 as a whole, and first lower part rotating member is for example made of plastics, It is hereinafter referred to as " selling " for the sake of simplicity.Pin 65 has lower part 66(for example, with reference to Fig. 5 and Figure 10), the lower part 66 can The main body of cam 44 is tied to via external screw thread/internal screw thread coupling.In this example, preceding sections are cylindrical and with outer Screw thread, thus provide external screw thread 66.On another side, cam 44 has threaded cylindrical seats, the circle at center Cylindrical seat provides internal screw thread 44a.Obviously, the opposite arragement construction of the external screw thread on component under discussion and internal screw thread is It is possible, even if the increase of this overall dimension that will bring them.Then, pin 65 has substantially stud-shape (stud-shaped) Top 67, for actuating for recycle valve 62-63.

Then, the arragement construction that actuates includes the top rotating member indicated as a whole by 68, described Top rotating member is for example also made of plastics, and for the sake of simplicity hereinafter defined as " brake apparatus (arrest) ". Brake apparatus 68 is installed in the cavity segment 39b of top on the part of pin 65 66, so as to rotate around axis R, but example Such as by means of concept suitable supporting element known per se or spacer by axial constraint, the suitable supporting element or interval Part extends in cavity segment 39b, and preferably also there is the purpose for guaranteeing the alignment between component 44,65 and 68 (to scheme In 6-10, such supporting element or guiding piece are partially visible, and are indicated by 72).

Brake apparatus 68 has axial passageway 69(Fig. 6-8), the bar (stem) 67 of pin 35 is bonded on via prismatic In the axial passageway 69.In other words, the coupling between bar 67 and access 36 enables the axial translation in access 69 of bar 67, But prevent the former any rotation in the latter.In this example, for this purpose, bar 67 has section, the section has non-circular The geometric configuration of shape, especially quadrangle, and at least one extending part of access 69 has corresponding complementary shape.

The arragement construction that actuates of recycle valve 62-63 includes at least one anti-rotation system or ratchet mechanism, it is described at least One anti-rotation system or ratchet mechanism be configured to for enable brake apparatus 68 along herein be clockwise motor Privileged direction F rotation, and prevent or prevent brake apparatus 68 from rotating in opposite direction.Example shown in figures 6 to 10 In, brake apparatus 68 includes part 68a, with circular profile, to guide rotation；And part 68b, around take turns Exterior feature defines multiple teeth 70.In addition, the ratchet mechanism further includes the element 71 of the outer profile of resilient abutment part 68a.Showing In example, which is made up of thin slice (lamina), preferably sheet metal, wherein what fixed part was indicated by 72 Supporting element is held in place, and wherein, defined herein as " brake portion " opposite segments along direction bullet generally radially Property be pressed in brake apparatus 68 toothed portion point outside on.The profile of the corresponding part of brake apparatus 68 and thin slice 71 is with such as Under type shapes, it may be assumed that rotating clockwise for brake apparatus is free to occur, wherein braking parts of the tooth 70 in thin slice 71 / lower slider, and after tooth is engaged with the brake portion of thin slice, it prevents from rotating counterclockwise.Referring to Fig. 6-7, in the operation of pump The step of in, the lower external thread 66 of pin 65 is fully screwed in the internal screw thread 44a limited in cam 44.Motor 33 The rotation of axis 33a F along clockwise direction causes the rotation of cam 44, this actuation piston 41.Pin 65 is in the rotation relative to cam 44 It is fixed in turning, and therefore, by the prismatic coupling between bar 67 and brake apparatus 68, the latter is also to be freely rotated, only The torque to apply via cam 44 is higher than the power of the elastic reaction of thin slice 71.In such operating procedure, bar 67 is complete It is lowered in access 69, as example can see in figure 6 and figure 7.

In the case where control system issues the order of rotation for reversing motor, component 44,65 and 68 tends to along suitable Clockwise rotation, but when 71 soldered tooth 70 of thin slice, the rotation of brake apparatus 68 is prevented by ratchet mechanism, and also with this The rotation of the kind anti-shotpin 65 of mode: for example, with reference to Fig. 8 to Figure 10, wherein pass through arrow B and indicate rotation counterclockwise.Due to outer spiral shell Line/internal screw thread coupling, cam 44 can be alternatively rotated in the clockwise direction, to make the external screw thread 66 of pin 65 from internal screw thread 44a is gradually unscrewed, as emphasized in such as Fig. 8 and Fig. 9.Therefore, pin 65 is gradually increasing as a whole.Bar 67 occurs therewith Rising bring open/close element 62 resist corresponding spring 63 effect rise, so that recycle valve be made to open.It is false The shape and/or size in the section of fixed pole 67 are less than the shape and/or size of port 60a, then the conveying outlet 35 of pump 4 is set It is in fluid communication at chamber 39a-39b, and therefore, is finally in fluid communication with inlet port 34.On the one hand, Figure 11 and Figure 13, and On the other hand, Figure 12 and Figure 14 accurately illustrates the maximum decline and the maximum state risen of pin 65, this correspondingly corresponds to The state of state and opening that recycle valve 62-63 is closed.During pin 65 rises, anti-rotation system is preferably swashed It is living.In particular, prism shaped segment 65a of the pin in the middle position between external screw thread 66 and bar 67 is reached under guiding piece 72 The corresponding seat 72a(limited in portion is visible in Figure 11 and Figure 12).There are two opposite plane surface, pins for this 72a tool 65 aforementioned prism shaped segment 35a can be passed through between described two opposite plane surfaces, to stop selling itself rotation Turn.Preferably, aforementioned seat 72a has at least one introducing portion (lead-in), such as inclined plane at top, to promote It is inserted into prism shaped segment 65a.In addition, in the state of completing external screw thread 66 and being unscrewed from internal screw thread 44a (Figure 10), and In the case where being rotated by the anti-shotpin 65 of prismatic coupling 65a-72a, cam 44 also can continue to rotate.

Then, direction of rotation is reversed, that is, so that motor 33 again along privileged direction F rotation (substantially follow Figure 10, The sequence of Fig. 9 and Fig. 8).The spring 63 of recycle valve acts in open/close element 62, and therefore, acts on pin 65 On bar 67, to maintain the contact between external screw thread and internal screw thread.Rotating clockwise for cam 44 tends to cause pin 65 and braking The similar rotation of device 68.However, as especially can see in Figure 12, between the middle section 65a and seat 72a of pin Determining prismatic coupling prevents rotation of the pin 65 towards raised position (unscrewing).In this way, the rotation clockwise of cam 44 Turn to determine that the external screw thread 66 of pin 65 is screwed in the internal screw thread 44a of cam 44, to make pin itself reduction, the pin is in the step In be static.Therefore, the reduction of pin 65 causes the release of previously mentioned anti-rotation system 65a-72a.At this point, recycle valve It closes, and pin 65 and cam 44 fixedly rotate.

The mouth of internal screw thread 44a can be advantageously constructed for promoting external screw thread 66 to be screwed in internal screw thread 44a again.

During the operation of pump 4, it may happen that air is present in one or more cylinders 68, to endanger work Fill in the validity in terms of pumping water.In such a state, open/close element 52 and corresponding spring 53 can not generate Higher than the pressure of pressure present on conveying circuit (delivery circuit).Therefore, valve 52-53 will not be opened, and pump 4 It will not make fluid displacement.Therefore, the opening of the recycle valve 62-63 obtained in the foregoing manner makes it possible to obtain water from pump 4 Delivery section is towards the recycling of introducing portion, and to make it possible to discharge pressure bringing back to atmospheric pressure, this makes it possible to eliminate It may be present in any air in pump 4.

Certainly, the motor 33 of pump causes to be similar to previously described piston along the rotation of the direction B opposite with privileged direction F 41 axial movement.However, introduce pressure and discharge pressure be correspondingly, and even if piston continues to shift water, do not have yet Real migration of the fluid between inlet port and conveying outlet, wherein all water recycles in pump itself.

In one embodiment, each conveying that the circulation that recycle valve 62-63 is opened is arranged on liquid product terminates When.Therefore, in this case, after capsule 12 is inserted into machine and brewing room is closed, such as by by pressing The conveying of button, beverage starts, wherein control system starts motor 33 along preferential direction of rotation F.(pass through at the end of conveying Push button determines, or once has been subjected to the given time after conveying a certain amount of beverage), control system stops motor 33, and the order for it along the direction of short duration rotation opposite with privileged direction is issued, to obtain beating for recycle valve 62-63 It opens, and therefore, obtains the starting perfusion of pump, as discussed previously.In this state, it is present in pipeline defeated for being transported to The water of sending component 11 can also be flowed back to towards the inside of pump 4.

The state that recycle valve is opened can be maintained, until the conveying next time of liquid product or the valve can lead to Cross along preferential direction of rotation it is of short duration actuate be again switched off (closing of valve 62-63 also implies that the very short of motor 33 actuates, And therefore, it is intended that the liquid of negligible quantity is pumped at delivery section 35).

Therefore, the solution proposed makes it possible to obtain the opening of valve with identical motor 33 using one, uses In the starting perfusion of pump 4, and it is therefore not necessary to arragement construction is perfused in the starting of specific specific actuator and/or complexity.

By above description, characteristic of the invention is clearly presented, the advantages of thus providing similarly is provided.

Obviously, those skilled in the art can be with many modifications may be made, without thus taking off for the machine described as example From the scope of the present invention limited in accompanying claims.

Screw thread between external screw thread 66 and internal screw thread 44a can be Left-hand threads, and anti-rotational arragement construction 70-71 can It prevents from rotating clockwise and component 68 is rotated counterclockwise to be built into.In this case, aforesaid operations principle It remains unchanged, except the fact that, it may be assumed that recycle valve closes the rotation (screwing) counterclockwise using cam 44 to obtain, and In the case where it rotates clockwise (unscrewing), the opening of recycle valve is obtained.

In possible variant embodiments, piston holder component 36 may include the only one with corresponding piston 41 Cylinder 38 or multiple cylinders and more than two piston.

Claims (17)

1. a kind of machine for being used to prepare liquid food products, includes at least:

The source (2) of liquid；

Conveying assembly (11), with brewing room (11a, 11b), the brewing room (11a, 11b) is configured to for receiving liquid The precursor of body food product, and produced for conveying the food after the liquid is by the brewing room (11a, 11b) Product；

It pumps (4), is used to pass through the liquid pumping in the source (2) from the liquid brewing room of the conveying assembly (11) (11a, 11b), and cause the conveying of the food product as a result,；And

Control system (15) is configured to the motor (33) with rotary shaft (33a) for controlling the pump (4),

Wherein, the pump (4) has pump case (30), and the pump case (30) has entrance (34) and outlet (35), in the pump case (30) it is defined in cylinder (38), piston (41) at least partly extends in the cylinder (38), to limit variable volume Operating room；

Wherein, between the rotary shaft (33a) and the piston (41) of the motor (33) there are transmission layout structure (44, 48), the transmission layout structure (44,48) be configured to for cause the piston (41) have progressive position and retract position The reciprocating motion of predetermined stroke between setting, and change the volume of the operating room of the variable volume as a result, the transmission cloth Setting structure (44,48) includes actuation member (44), the actuation member (44) by the rotary shaft (33a) of the motor (33) come Driving rotation, and the piston (41) are operatively coupled,

Wherein, the pump (4), which has, introduces valve (42-43) and transfer valve (52-53), for correspondingly by the variable volume Operating room is connected into be in fluid communication with the entrance (34) of the pump case (30) and outlet (35), and the introducing valve (42-43) is by structure It causes for being correspondingly in open position and closing because of displacement of the piston (41) towards its progressive position and retracted position Position, and the transfer valve (52-53) be configured for correspondingly because the piston (41) towards its retracted position and before Displacement that carry is set and be in open position and closed position,

The machine is it is characterized by: the actuation member (44) has cam path (47), and the piston (41) is via opposite The cam follower (48) answered is couple to the cam path (47), and the cam path (47) is configured for described in determination The predetermined stroke of the piston (41) between the progressive position and the retracted position.

2. machine according to claim 1, it is characterised in that:

At least one other cylinder (38) is defined in the pump case (30), corresponding another piston (41) is described another At least partly extend in outer cylinder (38), to limit the operating room of another variable volume；

The pump (4) has at least one other introducing valve (42-43) and at least one other transfer valve (52-53), For correspondingly the operating room of another variable volume to be connected into and the entrance (34) of the pump case (30) and outlet (35) It is in fluid communication；

Another piston (41) is couple to the cam of the actuation member (44) via corresponding cam follower (48) Path (47), the cam path (47) are arranged for determining the piston (41) and another piston (41) in phase in advance Predetermined stroke between the progressive position answered and retracted position.

3. machine according to claim 1, which is characterized in that the actuation member includes drum cam (44).

4. machine according to claim 2, which is characterized in that the cam path (47) constructs as follows, it may be assumed that The progressive position of the piston (41) corresponds to the retracted position of another piston (41), and vice versa.

5. machine according to any one of the preceding claims, which is characterized in that the actuation member (44) can be according to The axis rotation being overlapped with the rotation axis (R) of the rotary shaft (33a) of the motor (33).

6. machine according to claim 1, which is characterized in that the pump case (30) defines receiving piston holder component (36) chamber (31), the piston holder component (36) define the cylinder (38).

7. machine according to claim 1, it is characterised in that:

The piston (41) has proximally and distally, and cavity (41a) extends between the proximal end and the distal end；

The introducing valve (42-43) is in the cylinder (38), and is configured for that the piston (41) is presented Cavity (41a) is in the position of the corresponding opening and closing of corresponding far-end；And

At least in the retracted position, the proximal end of the piston (41) is in the aerated area limited in the pump case (30) In (39a).

8. machine according to claim 1, which is characterized in that the motor (33) is direct current generator.

9. machine according to claim 1, which is characterized in that the control system (15) include in the following terms at least One:

For measuring the device (A) for the electric current that the motor (33) is absorbed；

For controlling the device (V) of the supply voltage of the motor (33)；And

For controlling the device (V) of the rotation speed of the motor (33).

10. machine according to claim 9, which is characterized in that the control system (15) is arranged for calculating in advance At least one of the following terms:

Pressure at the outlet (35) of the pump (4), this is the value of the electric current absorbed based on the motor (33)；

The rotation speed of the motor (33), this is the value and the motor (33) of the supply voltage based on the motor (33) The value of the electric current absorbed；

The flow of the pump (4), this is the rotation speed based on the motor (33).

11. machine according to claim 9, which is characterized in that the control system (15) by advance arranged for changing At least one of the following terms:

The flow of the pump (4), this is the rotation speed by changing the motor (33)；

Pressure at the outlet (35) of the pump (4), this is the electric current by being absorbed according to the motor (33) to change The supply voltage of the motor (33).

12. machine according to claim 1, which is characterized in that the motor (33) is either-rotation motor, and the control System (15) includes inverse between Main way (F) and minor direction (B) for controlling the direction of rotation of the motor (33) The device (I) turned.

13. machine according to claim 12, which is characterized in that the pump (4) has starting perfusion system, the starting Perfusion system includes recycle valve (62,63) and corresponding actuates arragement construction (44,65,68,71).

14. machine according to claim 12, it is characterised in that:

The pump (4) has starting perfusion system, and the starting perfusion system includes recycle valve (62,63) and corresponding Actuate arragement construction (44,65,68,71)；And

The arragement construction (44,65,68,71) that actuates is arranged for making the recycle valve (62,63) in the electricity in advance Machine (33) is opened after the minor direction (B) rotation.

15. machine according to claim 13, which is characterized in that the arragement construction that actuates includes:

- the first rotating member (65), with top (67) and lower part, the top (67) for the recycle valve (62, 63) control, the lower part are couple to the actuation member by the coupling with external screw thread (66) and internal screw thread (44a) (44)；

- the second rotating member (68), axial constraint is on the lower part of first rotating member (65), second rotation Turn component (68) with axial passageway (69), the top (67) of first rotating member (65) is bonded on via prismatic In the axial passageway (69)；

At least one anti-rotational arragement construction (70,71) is configured to for so that second rotating member (68) can It is rotated along the Main way (F), and prevents second rotating member (68) from rotating along the minor direction (B).

16. machine according to claim 1, which is characterized in that the brewing room (11a, 11b) is configured for receiving It include the precursor of the liquid food products in capsule (12).

17. machine according to claim 2, which is characterized in that at the cylinder (38) and the other cylinder (38) In with each other and the position parallel relative to the rotary shaft of the motor (33) (33a).